fowle



PATENT oEEioE.

J. wrowLEioE isoSToN, MASSACHUSETTS.

STEAM DRIELme-MACH'INE Specification of Letterslatent Nl'o. 7,972,5dated March 11,` 1851` i ToaZZ whom t may concern.' .A

Be it known that I, JOSEPH l/V. FowLE, of Boston, in the county of Suffolk `and State of `Massachusetts, have invented cer-A, tam new and useful Improvements in `Steam Drilling Apparatus, and that the following description, taken in connection `with the `accompanying drawings, hereinafter referred to, forms a full and exact specification of the same, wherein I have set forth' the nature and principles of my said `improveniente by which my invention maybe distinguished from others of a similar class,

. together `with such parts as I `claim and desire to Patent. 1....,

The figures of the accompanyingplates of drawings represent my improvements.

In Plate 1, Figure 1 is a side elevation of my improved drilling apparatus. In Plate 2, Fig. 2 is a plan of the apparatus, Fig. 3 is a `detail longitudinal verticali section,

`have securedto me by Letters taken in the plane of the line A, B, Fig. 2

and Fig. 4t is a transverse vertical section taken in the plane of the line C, D, Fig. 2.

In the machines which have been recently devised for splitting and `dressing stone, &c., by steam, the dressing or cutting tool has been so connected tothe piston .rod,fas to be worked by the direct action of the steam. This feature I have incorporated in ny improvements, and I have also combined with it an arrangement for supporting the engine, and the drilling tool which it drives, in a frame whichfniay swing and be raised `and lowered so as to drill in any direction and at any height, also, a mechanical pro-` vision for turning the tool and one for advancing it as the drilling progresses; and, furthermore, an improved mode of preventing the direct action of the steam, from throwing the piston, as the tool is driven forward and back, through either head of the" cylinder. i

E, E, E, is a horizontal frame, having proper rails F F, `on which the supporting framework G, G, G, for the operating parts of the apparatusrest, and move along, the sliding or moving ofthe same, being effected by the rack and pinion shown at H H in Fig. 1, Pl. 1, or in any other of the well known ways for producing such movements. On the rear part of the framework G, G, G, is the steam boiler I I, `the steam from which is conducted through the ointed pipe K K to the cylinder L of the engine.` `This cylinder,withall` its appendages, hereinafter referred to, and described, is supported onthe rectangular frame M M, whichis hungat its center, so as to swing therein, H the vertically sliding boxes or bearingsvhT N which move up and down in vthe rectangular openings O, O, O,`O,in the vertical part of the `framework G, G, These boxesare suspended at the ends of lowered by means of the windlass Q Q, to whlch said cords pass over the several guid- `pulleys R, R, R. Said windlass is pro- 1n vi ed with a ratchet wheel and pawl at S,

, the `cords P, P, I), P, and are raised or and the sliding 1boxes may be confined in lany desired position, by means of the nuts and screws at T, working with the confiningV buttons U Ul `in a manner which will be i readily understood by inspection of Fig. 1, Pl.` 1, and Fig: 2, Pl. 2. The frame M M is f supported, inthe various diagonal positions into which it may bedesired to swing it, by l the sustaining `rods V V which are connect-` ed toitslower endon each side, and which, at their other ends, are bent so as to fit into the holes W, WV, &c., formed in the horizontal and vertical metallic plates X, X, Y, Y, Fig. 1,.Pl.1,` and Fig. 2, Pl. 2.

tool 1b `properly fastened to its outer end. {iSaid drill shaft is attached to, or connected 0,` a is the drill shaft, having the drilling directly with, the cross head c c of the en` gine, so as to be nearly an elongation, as it were, of the piston rod' d` d, sot-hat the tool is driven forward bythe entire power `of the steam acting on the piston e, Fig. 3, y{Plate 2. The cross head movesforward and back on the `guides f', f, f, f, in the usual way, and the drill shaft a a 1s arranged so as to turn `in its bearings g g, as it moves backward, with the cross head, by the following combination of mechanical devices.

A diagonal rod L is fastened to the projections z', z' from the engine, as shown in Fig. 1, Pl. 1, and Figs. 2 and 3, Pl. 2. A ratchet wheel la, Figs. 2` 3 and 4c, Pl. 2,

is permanently fastened to the inner end of said drill shaft, as shown in said figures, and a pawl holder `Z Z (having a proper pawl m which ingages with the teeth ofsaid ratchet wheel) extends upward and is forked at its top, so as to embrace the diagonal rod h L, as shownin said Fig. `4f, Pl. 2. As the drill shaft moves forward, the pawl 1m moves over the teeth of the ratchet wheel andas the shaft moves back-` ward the same pawl engages with the teeth and unerringly turns the tool so that in going forward again it strikes in a different place.

The danger of driving the piston through the heads of the cylinder, by reason of using the direct action of the steam, in driving the drill, is obviated, in my improvements,

by a peculiar mechanical arrangement for operating the rocker shaft and shifting the valve of the engine, just immediately preceding each stroke of the drill or before the piston fit-s close to either end of the cylinder. The rocker shaft is a bell crank having its arms nearly at right angles to each other shown in Fig. 2, Pl. 2, having a proper fulcrum at o. At the end of one of its arms it is secured to the valve rod p, and at the other, it has a small pin or stud Q which fits into and is moved or operated upon by the diagonal slot 7" in the plate s attached to the rear of the sliding rod t t, which rod moves forward and back in proper guides at u a, attached'to the engine. From each end of this diagonal slot r, a horizontal slot or one parallel to the axis of the cylinder L, eX- tends toward the front and rear of the said cylinder, as shown at v and w in Fig. 2, Pl. 2. The rod t t is moved forward and back, by means of a stud a: on the cross head c c, which, as said cross head moves forward and back, abuts against the adjustable tappets 1/ y secured on said rod at proper points, so as to shift the valve atthe proper time, as herein above suggested. Now when the stone is soft, if the momentum which the piston has acquired, would have a tendency to carry the cross head further along than the usual length of stroke, or than would be sufficientto open the valve to a proper degree, the horizontal slots at o and w (after the diagonal slot 1" has shifted the valve) only slide on the pin or stud g of the rocker and have no further effect upon the valve.

The next thing in course to be described, i'sthe mechanical arrangement for feeding the engine and* drill shaft forward, as the tool enters the rock. The engine and its appendages are arranged, so as to slid forward and back on the ways a a, a a, Figs. 2 and 4, Pl. 2. A nut b attached to the engine frame fits on and is worked by the screw shaft c 0, which is arranged so as to revolve intermittently at each stroke of the engine, and move the whole apparatus forward, a little each time. This shaft turns in its bearings d, d, attached to the swinging frame M M and has a ratchet and pawl e at its rear end, to retain the gain lwhich is made from. time to time in the forward movement of the apparatus. A metallic inclined plane f is attached to the side of the cross head c c, and as said cross head moves forward, this inclined plane presses against the end g of the pawl holder 7L z, and the pawl i, moved with said holder, engages with the teeth of the ratchet wheel 7c fixed on the screw shaft c c, as shown in Fig. 2, Pl. 2, and thereby turns said shaft, and effects the desired feeding motion. The same end, it will be seen, may be produced, by means of a rag wheel working in a cha-in, attached to the two ends of the engine, said wheel being turned by the screw shaft in the manner well understood by machinists.

That I claim as my invention and desire to have secured to me by Letters Patent is- The combination of a direct action steam drill in which both engine and drill are mounted an a frame which slides in a swinging frame capable of being adjusted in any required position, with the apparatus substantially as herein above described which is connected with and actuated by the cross head of the engine for causing the sliding frame to move along the swinging frame toward the rock.

JOSEPH `W. FOVVLE.

Witnesses:

EZRA LINCOLN, R. J. FENNELLY. 

